Shared information distributing device, holding device, certificate authority device, and system

a certificate authority and information distributing technology, applied in the field of shared information distributing devices, holding devices, certificate authority devices, systems, etc., can solve the problems of malicious third parties using private keys in an unauthentic manner and spoofing certificates by malicious parties
US20100235588A1Active Publication Date: 2010-09-16PANASONIC CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
PANASONIC CORP
Publication Date
2010-09-16

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Abstract

A distributing device for generating private information correctly even if shared information is destroyed or tampered with. A shared information distributing device for use in a system for managing private information by a secret sharing method, including: segmenting unit that segments private information into a first through an nth pieces of shared information; first distribution unit that distributes the n pieces of shared information to n holding devices on a one-to-one basis; and second distribution unit that distributes the n pieces of shared information to the n holding devices so that each holding device holds an ith piece of shared information distributed by the first distribution unit, as well as a pieces of shared information being different from the ith piece of shared information in ordinal position among n pieces of shared information, “i” being an integer in a range from 1 to n.
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Description

TECHNICAL FIELD

[0001] The present invention relates to distribution and management of a plurality of pieces of information generated by segmentation of private information that is important information such as a private key, and to a technology for restoring the original private information by using the plurality of pieces of information.BACKGROUND ART

[0002] In recent years, electronic commerce such as the net banking and the online shopping has been widely used in the Internet. In such electronic commerce, the public key based technology is used to prevent the transactions from being tampered with.

[0003] The public key based technology prevents transactions from being tampered with by the structure where an authority called certificate authority issues a certificate (public key certificate) of a public key complying with the public key encryption, to online shopping sites and the like, and the users of the sites use the issued public key certificate. More specifically, the public key ...

Claims

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